My father was born in 1914 and grew up on a farm. His folks died when he was one year old and his mothers folks adopted him. When he was about ten he got a colt. He trained it best he could and one thing he had it do was put its front feet over your shoulders and stand there. It was cute when he was a colt. When he was a year old his grandfather went out in the corral and clapped his hands. That was the signal to come over and rear up on his hind legs and put his front legs over your shoulders. Grandpa didn't know that and the result was unpleasant. For all three of them. Grandpa broke his arm. My father got beat. The horse got sold. I heard this story when I was still pretty young.